Entropy - learning decision trees, Computer Engineering

Assignment Help:

Entropy - learning decision trees:

Through putting together a decision of tree is all a matter of choosing that attribute to test at each node in the tree. Further we shall define a measure that is information gain that will be used to decide which attribute to test at each node. By considering through information gain is itself calculated utilising a measure called entropy that we first define for the case of a binary decision problem so then define for the general case. 

As per given a binary categorisation like C, and a set of examples, S, that are utilising the proportion of examples categorised as positive by C is p+  or the proportion of examples categorised  like negative by C is p-, then the entropy of S is as: 

641_Entropy - learning decision trees.png

Now next here instantly we defined entropy first for a binary decision problem is easier to get an impression of what it is trying to calculate. As Tom Mitchell puts this quite well: like 

"In order to define an information gain precisely so we begin by defining a measure commonly utilising in information theory that is called entropy in which characterizes the (im)purity of as an arbitrary collection of examples."


Related Discussions:- Entropy - learning decision trees

Define relocation bits utilized by relocating loader, Relocation bits used ...

Relocation bits used by relocating loader are specified by? Ans. Relocation bits utilized by relocating loader are identified by Assembler or Translator.

Define signal and component of obejct oriented modeling, Define about sign...

Define about signal and component of obejct oriented modeling A signal is a specification of an asynchronous stimulus communicated among instances. A component is a physical

Turning machine, procedure of turning machine operation on markov algorithm...

procedure of turning machine operation on markov algorithm

What is loadrunner, LoadRunner works by making virtual users who take the p...

LoadRunner works by making virtual users who take the place of real users operating client software, such as sending requests using the HTTP protocol to IIS or Apache web servers.

What are the two primary models of supply chain management, What are the tw...

What are the two primary models of Supply Chain Management? The Two Primary models of Supply Chain Management are:- 1.  Porter's Value Chain Model 2. Supply Chain Model

Write the binary representation of an integer number, The integer n = 3,510...

The integer n = 3,510,593 has hexadecimal representation 0x00359141 (check this with your d2h program), while the double precision, floating-point number 3510593.0 has hexadecimal

Explain differences between folded and non-folded network, Explain differen...

Explain differences between folded and non-folded network. Folded network: While all the inlets/outlets are connected to the subscriber lines, the logical connection shows as

Convert the following into sop form, Convert the following into SOP form ...

Convert the following into SOP form 1. (A+B) (B'+C) (A'+ C) 2. (A'+C) (A'+B'+C') (A+B') 3. (A+C) (AB'+AC) (A'C'+B)

How many flip-flops are required to construct mod 30 counter, How many flip...

How many flip-flops are required to construct mod 30 counter ? Ans. Mod - 30 counter +/- requires 5 Flip-Flop as 30 5 . Mod - N counter counts overall ' N ' number of state

Performance evaluation-parallel computing, Performance Evaluation In th...

Performance Evaluation In this part, we talk about the primary attributes used to measure the performance of a computer system. Unit 2 of block 3 is totally devoted to performa

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd